Aile Noire - Sirocco l'Aube TU04-FR003

If your opponent controls a monster and you control none, you can Normal Summon or Set this card without Tribute. Once per turn, you can target 1 face-up "Blackwing" monster you control until the end of this turn, it gains ATK equal to the total ATK of all face-up "Blackwing" monsters currently on the field (except the target). The monsters (except the target) cannot attack the turn you activate this effect.